﻿//-----------------------------------------------------------------------
// <copyright file="UrlHelperActionExtender.cs" company="OOHM PROCESSAMENTO DE DADOS LTDA.">
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//-----------------------------------------------------------------------
namespace AbstractSaaSTemplate.Web.UI.Helpers{    using System;
    using System.Globalization;
    using System.Web.Mvc;

    /// <summary>
    /// Provides specific extensibility for the UrlHelper.
    /// </summary>
    public static class UrlHelperExtension
    {
        /// <summary>
        /// Retrieves the routing data for the action, transforming it into an absolute Uri.
        /// </summary>
        /// <param name="url">UrlHelper for extension.</param>
        /// <param name="action">The action</param>
        /// <param name="controller">The Controller</param>
        /// <returns>returns an absolute uri for the action.</returns>
        public static string AbsoluteAction(this UrlHelper url, string action, string controller)
        {
            return AbsoluteAction(url, action, controller, null);
        }

        /// <summary>
        /// Retrieves the routing data for the action, transforming it into an absolute Uri.
        /// </summary>
        /// <param name="url">UrlHelper for extension.</param>
        /// <param name="action">The action</param>
        /// <param name="routeValues">The route values</param>
        /// <returns>returns an absolute uri for the action.</returns>
        public static string AbsoluteAction(this UrlHelper url, string action, object routeValues)
        {
            return AbsoluteAction(url, action, null, routeValues);
        }

        /// <summary>
        /// Retrieves the routing data for the action, transforming it into an absolute Uri.
        /// </summary>
        /// <param name="url">UrlHelper for extension.</param>
        /// <param name="action">The action</param>
        /// <param name="controller">The Controller</param>
        /// <param name="routeValues">The route values</param>
        /// <returns>returns an absolute uri for the action.</returns>
        public static string AbsoluteAction(this UrlHelper url, string action, string controller, object routeValues)
        {
            if (url == null)
            {
                return string.Empty;
            }
            
            Uri requestUrl = url.RequestContext.HttpContext.Request.Url;

            var absolutePath = string.Empty;
            if (!string.IsNullOrWhiteSpace(controller))
            {
                absolutePath = url.Action(action, controller, routeValues);
            }
            else
            {
                absolutePath = url.Action(action, routeValues);
            }

            var authority = requestUrl.Host;
            if (!requestUrl.IsDefaultPort)
            {
                authority = string.Concat(
                    authority,
                    ":",
                    requestUrl.Port);
            }

            string absoluteAction = string.Format(
                CultureInfo.InvariantCulture,
                "{0}://{1}{2}",
                requestUrl.Scheme,
                authority,
                absolutePath);

            return absoluteAction;
        }
    }
}

